Reading all tags from no files

[jangop]

The test

pyexiftool/tests/test_helper.py

Line 30 in 3889b77

def test_read_all_from_no_file(self):

fails. This used to be (I think) because

pyexiftool/exiftool/helper.py

Line 123 in 3889b77

def get_metadata(self, files, params=None):

returned None instead of [] but, looking at the source, apparently it (or rather get_tags) now raises TypeError if files evaluates to False (which both None and [] do).

Should that (raising TypeError) continue to be the expected behavior? If, so we should modify the test accordingly and adjust the docstring of get_metadata.

[sylikc]

I just fixed the test on this one with 715cfc8 . I changed it to a ValueError instead of a TypeError though... which seemed to make more sense...